Executive Summary

This vulnerability is a stack-based buffer overflow in the Samsung Open Source rlottie library. It occurs in the function gray_render_cubic when processing certain cubic curves. Specifically, the function uses an array as an arc stack and advances a pointer by 3 on each split. When the pointer reaches a certain offset, a write operation exceeds the array boundary, causing a stack overflow. This can be triggered by a malicious Lottie file containing an incorrect cubic curve.

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Impact Analysis

The stack-based buffer overflow can lead to a denial of service or potentially allow an attacker to execute arbitrary code. Since the vulnerability is triggered by processing a malicious Lottie file, an attacker could exploit this by providing crafted files to applications using the rlottie library, causing crashes or other unintended behavior.

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Detection Guidance

This vulnerability is triggered by a malicious Lottie file containing an incorrect cubic curve that causes a stack-based buffer overflow in the rlottie library. Detection would involve identifying such malicious Lottie files or monitoring the behavior of the rlottie library when processing these files.

Since the vulnerability occurs in the function gray_render_cubic within rlottie, one approach is to monitor or log any crashes or abnormal terminations of applications using rlottie when rendering Lottie files.

There are no specific commands provided in the available information to detect this vulnerability directly on your network or system.

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Mitigation Strategies

The immediate mitigation step is to update the rlottie library to a version that includes the fix for this vulnerability. The fix was merged on May 12, 2026, and involves adding a bounds check before calling gray_split_cubic() to prevent the stack overflow.

Avoid processing untrusted or malicious Lottie files that could exploit this vulnerability until the update is applied.

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